Fix exception when attempting to open file or directory

(mostly log directory, crash logs, etc ...) with default application on a system where this is not supported.
If opening fails, show a messagebox that also shows the file/directory name.

src/magic/data/MagicSetDefinitions.java

@@ -11,6 +11,7 @@ import java.util.List;
 import java.util.Scanner;
 import magic.model.MagicCardDefinition;
 import magic.model.MagicSetDefinition;
+import magic.ui.helpers.DesktopHelper;
 import magic.utility.MagicFileSystem;
 import magic.utility.MagicFileSystem.DataPath;
 import magic.utility.MagicResources;
@@ -89,7 +90,7 @@ public class MagicSetDefinitions {
                 );
             }
         }
-        Desktop.getDesktop().open(MagicFileSystem.getDataPath(DataPath.LOGS).toFile());
+        DesktopHelper.tryOpen(MagicFileSystem.getDataPath(DataPath.LOGS).toFile());
     }
 
 }

src/magic/ui/UiExceptionHandler.java

@@ -1,6 +1,7 @@
 package magic.ui;
 
 import magic.translate.MText;
+import magic.ui.helpers.DesktopHelper;
 import magic.ui.helpers.ImageHelper;
 import java.awt.Component;
 import java.awt.Desktop;
@@ -48,7 +49,7 @@ public class UiExceptionHandler extends FileExceptionHandler {
                 prompt += String.format("\n\n%s\n%s", MText.get(_S3), MText.get(_S4));
                 final int action = JOptionPane.showConfirmDialog(frame, prompt, MText.get(_S1), JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE, null);
                 if (action == JOptionPane.YES_OPTION) {
-                    Desktop.getDesktop().open(MagicFileSystem.getDataPath(MagicFileSystem.DataPath.LOGS).toFile());
+                    DesktopHelper.tryOpen(MagicFileSystem.getDataPath(MagicFileSystem.DataPath.LOGS).toFile());
                 }
             } else {
                 JOptionPane.showMessageDialog(frame, prompt, MText.get(_S1), JOptionPane.ERROR_MESSAGE);

src/magic/ui/helpers/DesktopHelper.java

@@ -1,8 +1,10 @@
 package magic.ui.helpers;
 
 import java.awt.Desktop;
+import java.awt.HeadlessException;
 import java.io.File;
 import java.io.IOException;
+import javax.swing.JOptionPane;
 import magic.exception.DesktopNotSupportedException;
 import magic.translate.MText;
 import magic.utility.MagicFileSystem;
@@ -30,10 +32,39 @@ public final class DesktopHelper {
             // Windows incorrectly assumes you mean "Magarena.exe".
             new ProcessBuilder("explorer.exe", folder.getPath()).start();
         } else {
-            Desktop.getDesktop().open(folder);
+            tryOpen(folder);
         }
     }
 
+    public static boolean tryDesktopOpen(final File target) {
+        try {
+            Desktop desktop = null;
+            if (Desktop.isDesktopSupported()) {
+                desktop = Desktop.getDesktop();
+            }
+            if (desktop != null) {
+                Desktop.getDesktop().open(target);
+                return true;
+            }
+        } catch (IOException e) {
+            return false;
+        }
+        return false;
+    }
+
+    public static void tryOpen(final File target) {
+        if (!tryDesktopOpen(target)) {
+            try {
+                JOptionPane.showMessageDialog(null, "Unable to open file or directory " + target.getAbsolutePath()
+                        + " with default application",
+                    "Error opening file or directory", JOptionPane.ERROR_MESSAGE);
+            } catch (HeadlessException e) {
+                System.err.println("Unable to open file or directory " + target.getAbsolutePath());
+            }
+        }
+    }
+
+
     public static void openDirectory(final String path) throws IOException {
         openDirectory(new File(path));
     }
@@ -45,7 +76,7 @@ public final class DesktopHelper {
                 // fails silently. The recommended solution is to use getRuntime().
                 Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + file.toString());
             } else {
-                Desktop.getDesktop().open(file.getAbsoluteFile());
+                tryOpen(file.getAbsoluteFile());
             }
         } else {
             throw new DesktopNotSupportedException(MText.get(_S1));
@@ -55,6 +86,7 @@ public final class DesktopHelper {
     public static void openContainingDirectory(File aFile) throws IOException {
         openDirectory(aFile.getAbsoluteFile().getParentFile());
     }
-    
+
-    private DesktopHelper() {}
+    private DesktopHelper() {
+    }
 }

src/magic/ui/screen/menu/dev/DevMenuContentPanel.java

@@ -18,6 +18,7 @@ import magic.game.state.GameLoader;
 import magic.game.state.GameStateFileReader;
 import magic.ui.ScreenController;
 import magic.ui.dialog.GameStateRunner;
+import magic.ui.helpers.DesktopHelper;
 import magic.ui.screen.menu.NewMenuScreenContentPanel;
 import magic.utility.MagicFileSystem;
 import magic.utility.MagicSystem;
@@ -103,7 +104,7 @@ class DevMenuContentPanel extends NewMenuScreenContentPanel {
         try (final PrintWriter writer = new PrintWriter(savePath.toFile(), UTF_8.name())) {
             missingCards.forEach(writer::println);
         }
-        Desktop.getDesktop().open(MagicFileSystem.getDataPath(MagicFileSystem.DataPath.LOGS).toFile());
+        DesktopHelper.tryOpen(MagicFileSystem.getDataPath(MagicFileSystem.DataPath.LOGS).toFile());
     }
 
     private void doSaveMissingCardsFile() {